1)I want to use this network scheme: subnet-1 -------- | PF | --------Firewall------cisco ----- Internet subnet-2 -------- | | VPN-server PF and Firewall - box'es with iptables . Does they need to have PPTP support to route traffic? 2)At all I have 7 subnets with a lot of traffic.6 subnets with users (in 50-400 users in each subnet) and 1 for server with web board, chat and news. Does anyone use iptables in gigabit network? How big nominally a throughput of gigabit network with filtering by iptables ?